Mechanical Engineering Exam > Mechanical Engineering Questions > In hydrodynamic bearingsa)the oil film pressu...
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In hydrodynamic bearings
- a)the oil film pressure is generated only by the rotation of the journal
- b)the oil film is maintained by supplying-oil under pressure
- c)no oil film is required in hydrodynamic bearings
- d)none of these
Correct answer is option 'A'. Can you explain this answer?
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In hydrodynamic bearingsa)the oil film pressure is generated only by t...
Hydrodynamic bearing is a thick film lubrication bearing in which oil pressure is generated due to rotation of shaft.
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In hydrodynamic bearingsa)the oil film pressure is generated only by t...
Introduction:
Hydrodynamic bearings are a type of fluid film bearing that rely on the rotation of the journal to generate oil film pressure. This oil film pressure helps to support and separate the rotating and stationary components of the bearing, reducing friction and wear.
Explanation:
In hydrodynamic bearings, the oil film pressure is generated by the rotation of the journal. Let's understand this in more detail:
1. Function of hydrodynamic bearings:
Hydrodynamic bearings are designed to provide a thin film of lubricating oil between the rotating journal and the stationary bearing surfaces. This oil film acts as a cushion and reduces the contact between the two surfaces, allowing smooth rotation with minimal friction.
2. Generation of oil film pressure:
The oil film pressure in hydrodynamic bearings is generated by the rotation of the journal. When the journal rotates, it creates a wedge-shaped region between the journal and the bearing surfaces. This region is filled with lubricating oil, and due to the rotation of the journal, the oil is dragged into the wedge-shaped space, causing pressure to build up.
3. Maintenance of the oil film:
To maintain the oil film in hydrodynamic bearings, it is necessary to supply oil under pressure. This is typically done through a lubrication system that delivers pressurized oil to the bearing. The pressurized oil is then distributed to the bearing surfaces, ensuring a continuous supply of lubrication to sustain the oil film.
4. Importance of the oil film:
The oil film in hydrodynamic bearings plays a crucial role in providing support and separation between the rotating and stationary components. It helps to reduce friction, dissipate heat, and prevent direct metal-to-metal contact, thereby extending the life of the bearing and improving its performance.
Conclusion:
In hydrodynamic bearings, the oil film pressure is indeed generated by the rotation of the journal. This pressure is essential for maintaining the oil film, which in turn provides lubrication and support to the bearing surfaces. Therefore, option 'A' is the correct answer.
Hydrodynamic bearings are a type of fluid film bearing that rely on the rotation of the journal to generate oil film pressure. This oil film pressure helps to support and separate the rotating and stationary components of the bearing, reducing friction and wear.
Explanation:
In hydrodynamic bearings, the oil film pressure is generated by the rotation of the journal. Let's understand this in more detail:
1. Function of hydrodynamic bearings:
Hydrodynamic bearings are designed to provide a thin film of lubricating oil between the rotating journal and the stationary bearing surfaces. This oil film acts as a cushion and reduces the contact between the two surfaces, allowing smooth rotation with minimal friction.
2. Generation of oil film pressure:
The oil film pressure in hydrodynamic bearings is generated by the rotation of the journal. When the journal rotates, it creates a wedge-shaped region between the journal and the bearing surfaces. This region is filled with lubricating oil, and due to the rotation of the journal, the oil is dragged into the wedge-shaped space, causing pressure to build up.
3. Maintenance of the oil film:
To maintain the oil film in hydrodynamic bearings, it is necessary to supply oil under pressure. This is typically done through a lubrication system that delivers pressurized oil to the bearing. The pressurized oil is then distributed to the bearing surfaces, ensuring a continuous supply of lubrication to sustain the oil film.
4. Importance of the oil film:
The oil film in hydrodynamic bearings plays a crucial role in providing support and separation between the rotating and stationary components. It helps to reduce friction, dissipate heat, and prevent direct metal-to-metal contact, thereby extending the life of the bearing and improving its performance.
Conclusion:
In hydrodynamic bearings, the oil film pressure is indeed generated by the rotation of the journal. This pressure is essential for maintaining the oil film, which in turn provides lubrication and support to the bearing surfaces. Therefore, option 'A' is the correct answer.
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In hydrodynamic bearingsa)the oil film pressure is generated only by the rotation of the journalb)the oil film is maintained by supplying-oil under pressurec)no oil film is required in hydrodynamic bearingsd)none of theseCorrect answer is option 'A'. Can you explain this answer?
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